ITEM NAME:12V 24V Dual 2 USB Charger Socket Blue LED Voltmeter Rocker Switch Panel Car Description: Input Voltage: 12V-24V USB (output) Voltage: 5V Output Current: 4.2A( Dual USB) LED Color: Blue Voltage Range: 6-30V Specification: Size: Approx. 45mmx24mm Hole Dimension: 36mmx21mm Material: Metal+ABS Package Includes: 1x Dual USB Charger with Voltmeter.Output Current: 4.2A( Dual USB). LED Color: Blue.